code: def arithmetic_win_operators(request):
      return request.param
  
file_path: pandas/pandas/tests/window/conftest.py
imports: from datetime import datetime, timedelta
  import numpy
  import pytest
  import pandas.util._test_decorators
  from pandas import DataFrame, Series, bdate_range
label_desc: Use image node_id 2 for calling a global function with example usage: arithmetic_win_operators(request) and returns: request